Another delicious Whitby Jet item, this one a curb link style chain, all faceted, and with graduated links so that the biggest links are in the middle and they scale down either end.
 It also has a large faceted jet ball attached with is about 25mm diameter
The bracelet opens by way of a large painted metal bolt.
 
The chain measures about 8.25" long but because it is chunky it actually feels like 6.5" long
Weighs - 31g
Excellent condition
English circa 1870